At idle, in park, if I hold the throttle just barely open the engine stumbles and sounds like its going to die.

/Capped off EGR and driveability is fixed with it capped. No vacuum going to the EGR. I assume the solenoid is bad. I'll have to take it off and test it. Problem now is, I guess I over torqued a bolt that holds the water pump on and now i've got a coolant leak up front I've got to deal with.